The one-of-a-kind Iso Rivolta GT Prototype has sold on My Car Quest.

This Iso Rivolta No. 002 is the original vision of what Giorgetto Giugiaro had in mind when he penned this beauty for Renzo Rivolta.

The Grifo and Bizzarrini GT 5300 were both built on a shortened Iso Rivolta chassis so this only surviving Rivolta prototype is also the chassis prototype for the Grifo and Bizzarrini GT 5300.

There was a brake heating problem on the rear in-board disc brakes on the Rivolta prototype No. 001 (which no longer exists) so the Iso engineers and Giotto Bizzarrini added the air vents shown below which exhaust air from the in-board disc brakes allowing better cooling of the brakes.

This is the only Iso Rivolta with the brake exhaust vents in this location because on the production version Iso placed the air exhaust vents on the lower portion of the C pillars.

Iso Rivolta No. 002 Rear Air Exhaust Vents

Iso also added air funnels under the car in front of the rear brakes to force air flow over the brakes. You can see those funnels on Grifos and on Bizzarrini GT 5300s.

The air exhaust vents can be seen on the C pillars of the production Iso Rivolta below but not on the prototype in the next photo below.